Saint Margaret’s Chapel is the oldest standing part of Edinburgh Castle. It was built in the 12th century, but stopped being used after a while. But now it is used again. Many people have weddings and baptisms in this small chapel. Although it is small, it is a pretty place with its five stained glass windows. The windows were put in by Douglas Strachan in 1922. The windows dicept St Margaret, St Andrew, St Columba, St Ninian and William Wallace.